ΔE 16.7, loose: different enough that you should pick on purpose. Red Leather is noticeably darker, more muted, warmer than Red Flesh.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Red Leather is noticeably darker, more muted, warmer than Red Flesh.
The same difference applies the other way round: Red Flesh is noticeably lighter, more saturated, cooler.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See Red Flesh on the colour wheel See Red Leather on the colour wheel
All matches: Red Flesh equivalents · Red Leather equivalents